Process for the manufacture of dried, resin-treated fiber furnis

Details Process for the manufacture of dried, resin-treated fiber furnis Process for the manufacture of dried, resin-treated fiber furnis

1983-08-19

1985-04-30

Chin, Peter

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With chemical or physical modification of liberated fiber

156 622, 156 624, 162 10, 162 24, 162166, 162182, 523330, 524 14, D21C 900

Patent

active

045142556

ABSTRACT:
The problem of resin precure encountered in fiberboard, especially medium-density fiberboard, produced by blow-line blending is overcome by adding an alkaline material to the wood fibers prior to blow-line blending in order to raise the pH of the wood preferably into the range of 4 to 7, and optimally around 5.5. Only the fiber used to form the surface layers of the mat which is hot pressed to form the fiberboard need have the alkaline material added thereto; alternatively, especially in the core layer of the mat, the action of the alkaline material may be reversed by adding an acid catalyst. The fiberboards formed have a glossy, hard surface which reduces the need for sanding.

REFERENCES:
patent: 2454534 (1948-11-01), Walter
patent: 2757148 (1956-07-01), Heritage
patent: 2757149 (1956-07-01), Heritage
patent: 2757150 (1956-07-01), Heritage
patent: 3021244 (1962-02-01), Meiler
patent: 3874990 (1975-04-01), Surdyk

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